Abstract
Fibrates and WY-14643 are widely used as lipid-lowering drugs via modulation of peroxisome proliferator-activated receptor alpha (PPAR α) for the treatment of a wide range of metabolic disorders. Here, to address the question whether PPAR α agonists can affect the enzymatic activity of 11beta-hydroxysteroid dehydrogenase1 (11β-HSD1), we tested fibrates and WY-14643 for the inhibition of cellular 11β-HSD1 activity in C2C12 myotubes. Only fenofibrate but not fenofibric acid, an active agonist of PPAR α, exerted a potent inhibitory activity in the cell based assay, showing an IC50 of 1.6 μM. Furthermore, we also demonstrated that the masking of carboxyl group in fenofibric acid via esterification or amidation was required for the inhibitory potencies of fenofibric acid derivatives against 11β-HSD1. In this presentation, we propose that fenofibrate can display a pharmacodynamic role distinct from fenofibric acid through masking of carboxyl group in fenofibric acid.
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Acknowledgments
This research was supported by the Center for Biological Modulators of the 21st Century Frontier R&D Program, Ministry of Education, Science and Technology, South Korea and by Basic Research Program, KRICT, South Korea. This work was also supported by grant (T3021A to HSJ) from Korea Basic Science Institute.
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Kim, C.H., Ramu, R., Ahn, J.H. et al. Fenofibrate but not fenofibric acid inhibits 11beta-hydroxysteroid dehydrogenase 1 in C2C12 myotubes. Mol Cell Biochem 344, 91–98 (2010). https://doi.org/10.1007/s11010-010-0532-4
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DOI: https://doi.org/10.1007/s11010-010-0532-4